One of my favorite college orientation/group bonding activities is trashing your insecurities.
Write down something that bothers you on a piece of paper, and then get rid of it.
You can crumble the paper, rip it up, run it through a paper shredder, burn it, whatever you feel – have fun with it!
You can do this by yourself or with friends. If you do it in a group there is no obligation to share what you wrote, but feel free if you find that helpful.
Letting go isn’t easy, but you’d be suprised how much a physical representation can help.